74 lines
2.4 KiB
Python
74 lines
2.4 KiB
Python
# orgnr.py - functions for handling Swedish organisation numbers
|
|
# coding: utf-8
|
|
#
|
|
# Copyright (C) 2012-2015 Arthur de Jong
|
|
# Copyright (C) 2014 Tomas Thor Jonsson
|
|
#
|
|
# This library is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU Lesser General Public
|
|
# License as published by the Free Software Foundation; either
|
|
# version 2.1 of the License, or (at your option) any later version.
|
|
#
|
|
# This library is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public
|
|
# License along with this library; if not, write to the Free Software
|
|
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
# 02110-1301 USA
|
|
|
|
"""Orgnr (Organisationsnummer, Swedish company number).
|
|
|
|
The Orgnr (Organisationsnummer) is the national number to identify Swedish
|
|
companies and consists of 10 digits. These are the first 10 digits in the
|
|
Swedish VAT number, i.e. it's the VAT number without the 'SE' in front and
|
|
the '01' at the end.
|
|
|
|
>>> validate('1234567897')
|
|
'1234567897'
|
|
>>> validate('1234567891') # invalid check digits
|
|
Traceback (most recent call last):
|
|
...
|
|
InvalidChecksum: ...
|
|
>>> format('123456-7897')
|
|
'123456-7897'
|
|
"""
|
|
|
|
from __future__ import annotations
|
|
|
|
from stdnum import luhn
|
|
from stdnum.exceptions import *
|
|
from stdnum.util import clean, isdigits
|
|
|
|
|
|
def compact(number: str) -> str:
|
|
"""Convert the number to the minimal representation. This strips the
|
|
number of any valid separators and removes surrounding whitespace."""
|
|
return clean(number, ' -.').strip()
|
|
|
|
|
|
def validate(number: str) -> str:
|
|
"""Check if the number is a valid organisation number. This checks
|
|
the length, formatting and check digit."""
|
|
number = compact(number)
|
|
if not isdigits(number):
|
|
raise InvalidFormat()
|
|
if len(number) != 10:
|
|
raise InvalidLength()
|
|
return luhn.validate(number)
|
|
|
|
|
|
def is_valid(number: str) -> bool:
|
|
"""Check if the number is a valid organisation number"""
|
|
try:
|
|
return bool(validate(number))
|
|
except ValidationError:
|
|
return False
|
|
|
|
|
|
def format(number: str) -> str:
|
|
"""Reformat the number to the standard presentation format."""
|
|
number = compact(number)
|
|
return number[:6] + '-' + number[6:]
|